(Xojo Plugin) Payeezy Place Temp Authorization Hold on Buyer’s Credit Card

Demonstrates how to place a temporary authorization hold for the desired amount on the buyer’s credit card. You can Capture the authorized amount on completion of service or Void/Refund the transaction as required.

Chilkat Xojo Plugin Download Xojo Plugin for Windows, Linux, Mac OS X, and ARM, ARM64

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

Dim crypt As New Chilkat.Crypt2
Dim prng As New Chilkat.Prng
Dim success As Boolean

// An API key such as y6pWAJNyJyjGv66IsVuWnklkKUPFbb0a
Dim apiKey As String
apiKey = "my_api_key"
// An API secret such as 86fbae7030253af3cd15faef2a1f4b67353e41fb6799f576b5093ae52901e6f7
Dim apiSecret As String
apiSecret = "my_api_secret"
// A token such as fdoa-a480ce8951daa73262734cf102641994c1e55e7cdf4c02b6
Dim token As String
token = "my_merchant_token"

// The nonce is a random number (bytes), something like "6057786719490086000"
Dim nonce As String
nonce = prng.GenRandom(8,"decimal")
System.DebugLog("nonce = " + nonce)

Dim dtNow As New Chilkat.CkDateTime
success = dtNow.SetFromCurrentSystemTime()
Dim sbTimestamp As New Chilkat.StringBuilder
// Get the epoch timestamp in seconds
success = sbTimestamp.Append(dtNow.GetAsUnixTimeStr(False))
// Change it to milliseconds
success = sbTimestamp.Append("000")
// The timestamp is a number similar to this: 1546011905000 (which is a timestamp taken on 28-Dec-2018).
Dim timestamp As String
timestamp = sbTimestamp.GetAsString()
System.DebugLog("timestamp = " + timestamp)

// Generate the following JSON request body:
// {
//   "merchant_ref": "Astonishing-Sale",
//   "transaction_type": "authorize",
//   "method": "credit_card",
//   "amount": "1299",
//   "currency_code": "USD",
//   "credit_card": {
//     "type": "visa",
//     "cardholder_name": "John Smith",
//     "card_number": "4788250000028291",
//     "exp_date": "1020",
//     "cvv": "123"
//   }
// }

Dim json As New Chilkat.JsonObject
success = json.UpdateString("merchant_ref","Astonishing-Sale")
success = json.UpdateString("transaction_type","authorize")
success = json.UpdateString("method","credit_card")
success = json.UpdateString("amount","1299")
success = json.UpdateString("currency_code","USD")
success = json.UpdateString("credit_card.type","visa")
success = json.UpdateString("credit_card.cardholder_name","John Smith")
success = json.UpdateString("credit_card.card_number","4788250000028291")
success = json.UpdateString("credit_card.exp_date","1020")
success = json.UpdateString("credit_card.cvv","123")
json.EmitCompact = False
System.DebugLog(json.Emit())

// string hashData = apiKey + nonce + timestamp + token + jsonString;
Dim sbHmacData As New Chilkat.StringBuilder
success = sbHmacData.Append(apiKey)
success = sbHmacData.Append(nonce)
success = sbHmacData.Append(timestamp)
success = sbHmacData.Append(token)
success = sbHmacData.Append(json.Emit())

// HMAC the data to produce a hex string.
crypt.EncodingMode = "hexlower"
crypt.MacAlgorithm = "hmac"
success = crypt.SetMacKeyString(apiSecret)
crypt.HashAlgorithm = "sha256"
crypt.Charset = "utf-8"
Dim hexHash As String
hexHash = crypt.MacStringENC(sbHmacData.GetAsString())
System.DebugLog("hexHash = " + hexHash)

// Now base64 encode the hex string:
Dim sbBase64Hash As New Chilkat.StringBuilder
success = sbBase64Hash.Append(hexHash)
success = sbBase64Hash.Encode("base64","utf-8")

System.DebugLog("This is the Authorization header to be sent with the payeezy request:")
System.DebugLog("Authorization: " + sbBase64Hash.GetAsString())

// -----------------------------------------------------------
// Now that we have the value for the Authorization header, send the POST containing the JSON.

Dim http As New Chilkat.Http

http.Accept = "*/*"
http.UserAgent = ""
http.SetRequestHeader "Authorization",sbBase64Hash.GetAsString()
http.SetRequestHeader "apikey",apiKey
http.SetRequestHeader "nonce",nonce
http.SetRequestHeader "timestamp",timestamp
http.SetRequestHeader "token",token

http.SessionLogFilename = "qa_output/payeezy.txt"

Dim url As String
url = "https://api-cert.payeezy.com/v1/transactions"
Dim resp As Chilkat.HttpResponse
resp = http.PostJson2(url,"application/json",json.Emit())
If (http.LastMethodSuccess <> True) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

System.DebugLog("response status code = " + Str(resp.StatusCode))
success = json.Load(resp.BodyStr)
System.DebugLog(json.Emit())

// Sample JSON response:

// {
//   "correlation_id": "228.4604632998994",
//   "transaction_status": "approved",
//   "validation_status": "success",
//   "transaction_type": "authorize",
//   "transaction_id": "ET175628",
//   "transaction_tag": "2313721985",
//   "method": "credit_card",
//   "amount": "1299",
//   "currency": "USD",
//   "cvv2": "M",
//   "token": {
//     "token_type": "FDToken",
//     "token_data": {
//       "value": "9732261336638291"
//     }
//   },
//   "card": {
//     "type": "visa",
//     "cardholder_name": "John Smith",
//     "card_number": "8291",
//     "exp_date": "1020"
//   },
//   "bank_resp_code": "100",
//   "bank_message": "Approved",
//   "gateway_resp_code": "00",
//   "gateway_message": "Transaction Normal"
// }
// 

System.DebugLog(json.StringOf("correlation_id"))
System.DebugLog(json.StringOf("transaction_status"))
System.DebugLog(json.StringOf("validation_status"))
System.DebugLog(json.StringOf("transaction_type"))
System.DebugLog(json.StringOf("transaction_id"))
System.DebugLog(json.StringOf("transaction_tag"))
System.DebugLog(json.StringOf("method"))
System.DebugLog(json.StringOf("amount"))
System.DebugLog(json.StringOf("currency"))
System.DebugLog(json.StringOf("cvv2"))
System.DebugLog(json.StringOf("token.token_type"))
System.DebugLog(json.StringOf("token.token_data.value"))
System.DebugLog(json.StringOf("card.type"))
System.DebugLog(json.StringOf("card.cardholder_name"))
System.DebugLog(json.StringOf("card.card_number"))
System.DebugLog(json.StringOf("card.exp_date"))
System.DebugLog(json.StringOf("bank_resp_code"))
System.DebugLog(json.StringOf("bank_message"))
System.DebugLog(json.StringOf("gateway_resp_code"))
System.DebugLog(json.StringOf("gateway_message"))